PR tree-optimization/58209
	* tree-tailcall.c (process_assignment): Handle POINTER_PLUS_EXPR.
	(find_tail_calls): Give up for pointer result types if m is non-NULL.
	(adjust_return_value_with_ops): For PLUS_EXPR and pointer result type
	emit POINTER_PLUS_EXPR.
	(create_tailcall_accumulator): For pointer result type accumulate in
	sizetype type.

	* gcc.c-torture/execute/pr58209.c: New test.

From-SVN: r201935